RECON: TNO occultation with 15KH173

Event between 15KH173 and star GA0740:06194612 with event index number of 1012164

Geocentric closest approach at 2020/02/06 04:00:08 UTC

J2000 position of star is 16:38:39.8 -14:12:09
Equinox of date position of star is 16:39:44.0 -14:14:19
Stellar brightness G=15.4, use SENSEUP=128
Star is 154 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=25.0

TNO is 30.2 AU from the Sun and 30.5 AU from the Earth.
The TNO is moving 18.7 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 1247 seconds.
The 1-sigma cross-track error in the shadow position is 5230 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=59.2 km assuming a 5% albedo -- 3.2 sec chord
Diameter=24.2 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15KH173, (2020/02/06 04:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:38.6 -26:28:30  0.9 12.42 154
13Zet Oph      16:38:16.1 -10:36:23  2.6  3.65 152
PPM 232182     16:49:35.6 -14:56:37  6.2  2.47 156
PPM 231910     16:37:53.1 -13:45:37  8.1  0.67 153
PPM 231960     16:39:53.9 -14:08:02  9.1  0.11 154
15KH173        16:39:48.0 -14:14:28 15.4       154
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 15KH173, (2020/02/06 04:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.42 154
13Zet Oph      16:37:09.6 -10:34:01  2.6  3.65 152
PPM 232182     16:48:27.0 -14:54:34  6.2  2.47 156
PPM 231910     16:36:45.1 -13:43:15  8.1  0.67 153
PPM 231960     16:38:45.8 -14:05:43  9.1  0.11 154
15KH173        16:38:39.8 -14:12:09 15.4       154
Positions are for J2000

Event circumstances last updated at 2018/12/02 21:47:25 UT

Marc W. Buie, Southwest Research Institute

RECON